diff options
| -rw-r--r-- | net/tipc/link.c | 5 | ||||
| -rw-r--r-- | net/tipc/msg.c | 14 |
2 files changed, 10 insertions, 9 deletions
diff --git a/net/tipc/link.c b/net/tipc/link.c index 944c8c663a2d..8c6639d107fc 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -1075,13 +1075,8 @@ void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr) if (unlikely(!tipc_msg_validate(skb))) goto discard; - /* Ensure message data is a single contiguous unit */ - if (unlikely(skb_linearize(skb))) - goto discard; - /* Handle arrival of a non-unicast link message */ msg = buf_msg(skb); - if (unlikely(msg_non_seq(msg))) { if (msg_user(msg) == LINK_CONFIG) tipc_disc_rcv(net, skb, b_ptr); diff --git a/net/tipc/msg.c b/net/tipc/msg.c index 4a64caf6fa20..ff8c64cd1cd9 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -165,6 +165,9 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf) } if (fragid == LAST_FRAGMENT) { + TIPC_SKB_CB(head)->validated = false; + if (unlikely(!tipc_msg_validate(head))) + goto err; *buf = head; TIPC_SKB_CB(head)->tail = NULL; *headbuf = NULL; @@ -172,7 +175,6 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf) } *buf = NULL; return 0; - err: pr_warn_ratelimited("Unable to build fragment list\n"); kfree_skb(*buf); @@ -378,10 +380,14 @@ bool tipc_msg_bundle(struct sk_buff_head *list, struct sk_buff *skb, u32 mtu) */ bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos) { - struct tipc_msg *msg = buf_msg(skb); + struct tipc_msg *msg; int imsz; - struct tipc_msg *imsg = (struct tipc_msg *)(msg_data(msg) + *pos); + struct tipc_msg *imsg; + if (unlikely(skb_linearize(skb))) + return false; + msg = buf_msg(skb); + imsg = (struct tipc_msg *)(msg_data(msg) + *pos); /* Is there space left for shortest possible message? */ if (*pos > (msg_data_sz(msg) - SHORT_H_SIZE)) goto none; @@ -463,11 +469,11 @@ bool tipc_msg_reverse(u32 own_addr, struct sk_buff *buf, u32 *dnode, if (skb_linearize(buf)) goto exit; + msg = buf_msg(buf); if (msg_dest_droppable(msg)) goto exit; if (msg_errcode(msg)) goto exit; - memcpy(&ohdr, msg, msg_hdr_sz(msg)); imp = min_t(uint, imp + 1, TIPC_CRITICAL_IMPORTANCE); if (msg_isdata(msg)) |